Fixed a minor issue in test_cfg.
Fixed a minor issue in test_cfg.

haylesr/angr,avain/angr,iamahuman/angr,tyb0807/angr,chubbymaggie/angr,f-prettyland/angr,angr/angr,xurantju/angr,terry2012/angr,chubbymaggie/angr,f-prettyland/angr,axt/angr,haylesr/angr,tyb0807/angr,axt/angr,zhuyue1314/angr,lowks/angr,GuardianRG/angr,lowks/angr,fjferrer/angr,cureHsu/angr,angr/angr,schieb/angr,zhuyue1314/angr,fjferrer/angr,iamahuman/angr,cureHsu/angr,terry2012/angr,chubbymaggie/angr,GuardianRG/angr,mingderwang/angr,avain/angr,tyb0807/angr,axt/angr,f-prettyland/angr,mingderwang/angr,schieb/angr,angr/angr,iamahuman/angr,schieb/angr,xurantju/angr